Material Revolution Revision Notes
MATERIALS REVOLUTION
UNIT REVISION BOOKLET
Vikram Mahal
How To Use this Booklet:
This booklet has been created by addressing all the points on the OCR B salters specification for the section, what’s in medicine. I advise reading through the Book, highlighting or underlining words written in ALL CAPITALS. I also suggest making a spider diagram or mind map to summarise key points and help the information here stick in your mind. You could also draw your own images by points on this book that may help you to remember that point. Alternatively, you could use this book to derive questions which yourself or other people could test you on! The choice is yours! Hope this helps.
THE CHEMICAL IDEAS IN THIS UNIT:
• Condensation polymers
• Amines and Amides
• Factors affecting the properties of Polymers
• Disposal of Polymers
A) Explain the term Electronegativity, recall qualitatively the electronegativity trends in the periodic table; use relative electronegativity values to predict bond polarity in a covalent bond; decide whether a molecule is polar or non-polar from its shape and the polarity of it’s bonds.
The ELECTRONEGATIVITY of an ATOM is a measure of the ability of that atom in a molecule to attract electrons in a chemical bond to itself.
As you to the RIGHT along the rows the more electronegative the atoms (due to the bigger nuclei). As you go UP the columns of the periodic table the MORE electronegative the atoms. FLUORINE is the most electronegative element on the periodic table!
We can use differences in electronegativity values to predict how POLAR a particular polar bond will be. C and H have similar electronegativities and so we can think of the C—H bond as being NON-POLAR.
Ionic and covalent bonds are extreme forms of bonding- polar bonding is somewhere IN BETWEEN the two. The BIGGER the difference in electronegativity between the atoms, the more polar the bond and the greater the Ionic
UNIT REVISION BOOKLET
Vikram Mahal
How To Use this Booklet:
This booklet has been created by addressing all the points on the OCR B salters specification for the section, what’s in medicine. I advise reading through the Book, highlighting or underlining words written in ALL CAPITALS. I also suggest making a spider diagram or mind map to summarise key points and help the information here stick in your mind. You could also draw your own images by points on this book that may help you to remember that point. Alternatively, you could use this book to derive questions which yourself or other people could test you on! The choice is yours! Hope this helps.
THE CHEMICAL IDEAS IN THIS UNIT:
• Condensation polymers
• Amines and Amides
• Factors affecting the properties of Polymers
• Disposal of Polymers
A) Explain the term Electronegativity, recall qualitatively the electronegativity trends in the periodic table; use relative electronegativity values to predict bond polarity in a covalent bond; decide whether a molecule is polar or non-polar from its shape and the polarity of it’s bonds.
The ELECTRONEGATIVITY of an ATOM is a measure of the ability of that atom in a molecule to attract electrons in a chemical bond to itself.
As you to the RIGHT along the rows the more electronegative the atoms (due to the bigger nuclei). As you go UP the columns of the periodic table the MORE electronegative the atoms. FLUORINE is the most electronegative element on the periodic table!
We can use differences in electronegativity values to predict how POLAR a particular polar bond will be. C and H have similar electronegativities and so we can think of the C—H bond as being NON-POLAR.
Ionic and covalent bonds are extreme forms of bonding- polar bonding is somewhere IN BETWEEN the two. The BIGGER the difference in electronegativity between the atoms, the more polar the bond and the greater the Ionic